I made a Tasks app. It runs completely fine without any error in code and the new task is also saved by clicking the save button but the newly added task does not display on the table view cell. First view controller for data display code:
import UIKit
class todolistVC: UIViewController , UITableViewDelegate , UITableViewDataSource {
@IBOutlet var table: UITableView!
@IBOutlet var label : UILabel!
private var tasks = [String]()
override func viewDidLoad() {
super.viewDidLoad()
self.title = "Tasks"
table.delegate = self
table.dataSource = self
//for saving data even after closing app
if !UserDefaults().bool(forKey: "setup"){
UserDefaults().set(true, forKey: "setup")
UserDefaults().set(0, forKey: "count")
}
updateTasks()
}
func updateTasks(){
tasks.removeAll()
guard let count = UserDefaults().value(forKey: "count") as? Int else{
return
}
for x in 0..<count{
if let task = UserDefaults().value(forKey: "task_\(x+1)") as? String{
tasks.append(task)
}
}
table.reloadData()
}
@IBAction func didTapAdd() {
let vc = storyboard?.instantiateViewController(withIdentifier: "entry") as! entryVC
vc.title = "New Task"
vc.completion = {
DispatchQueue.main.async {
self.updateTasks()
self.label.isHidden = true
self.table.isHidden = false
}}
navigationController?.pushViewController(vc, animated: true)
}
func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return tasks.count
}
func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "cell" , for : indexPath)
cell.textLabel?.text = tasks[indexPath.row]
return cell
}
func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath) {
tableView.deselectRow(at: indexPath, animated: true)
guard let vc = storyboard?.instantiateViewController(withIdentifier: "detail") as? DetailsVC else {
return
}
vc.title = "Task"
vc.task = tasks[indexPath.row]
navigationController?.popToViewController(vc, animated: true)
}
func tableView(_ tableView: UITableView, commit editingStyle: UITableViewCell.EditingStyle, forRowAt indexPath: IndexPath) {
if editingStyle == .delete {
tasks.remove(at: indexPath.row)
tableView.deleteRows(at: [indexPath],with: .automatic)
}
}
} the entry view controller code:
import UIKit
class entryVC: UIViewController, UITextFieldDelegate{
@IBOutlet var field: UITextField!
var completion : (() -> Void)?
override func viewDidLoad() {
super.viewDidLoad()
field.delegate = self
navigationItem.rightBarButtonItem = UIBarButtonItem(title: "Save", style: .done, target: self, action: #selector(saveTask))
}
func textFieldShouldReturn(_ textField: UITextField)-> Bool {
saveTask()
return true
}
@objc func saveTask(){
guard let text = field.text, !text.isEmpty else{
return
}
guard let count = UserDefaults().value(forKey: "count") as? Int else {
return
}
let newCount = count+1
UserDefaults().set(newCount, forKey: "count")
UserDefaults().set(text, forKey: "Task_\(newCount)")
completion?()
navigationController?.popViewController(animated: true)
}
}
